* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP942019 06/30/19 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 73% 92% LAT (deg N) 10.8 11.3 11.9 12.7 14.6 14.8 14.3 13.4 12.2 10.9 9.6 8.7 8.9 LON (deg W) 108.4 110.0 111.7 114.0 113.8 117.6 121.6 125.5 128.8 131.2 132.5 132.5 131.0 DTL (km) 995 1043 1098 1209 1007 1207 1519 1873 2228 2529 2639 2690 2665 TRACK SOURCE AP20 AP20 AP20 AP20 TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 73% is 1.7 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 92% is 1.6 times the sample mean ( 56%) --------------------------------------------------------------------------------------------- INDIVIDUAL PREDICTOR CONTRIBUTIONS TO PROBABILITY OF GENESIS ******* 48-HR ****** ******* 120-HR ****** AVG TCGI CONT AVG TCGI CONT DIVERGENCE -2.0 -4.6 9.7% -2.0 -2.8 13.2% VORTICITY 1.6 1.8 16.8% 1.5 2.3 23.8% VERTICAL SHEAR 12.9 18.2 10.3% 14.9 18.8 26.1% RH 79.1 72.2 6.8% 74.8 70.9 6.0% GOES 42.9 80.4 16.7% 42.8 80.4 14.0% DVORAK 0.9 1.5 12.3% 0.9 1.5 9.1% --------------------------------------------------------------------------------------------- PREDICTOR DEFINITIONS (Averaged Over 500 km Radius) GENESIS CLIM = Climatological Prob (%) of Genesis (Source: NHC-TAFB Invest Database) DIVERGENCE = GFS 850 hPa Horizontal Divergence (x10-7 s-1) VORTICITY = GFS 850 hPa Vorticity (x10-6 s-1) VERTICAL SHEAR = GFS 200-850 hPa Vertical Shear (kt) RH = GFS 600-850 hPa Relative Humidity (%) GOES = GOES Water Vapor Pixels Colder than -40C (%) DVORAK = Dvorak T-number, source: TAFB Version 3.0, July 2018